Apparatus for making concrete posts



Aug. 24, 192s'. 15973164Y w. J. MaKENzlE APPARATUS FOR MAKING OONCRETE POSTS Filed August 16, 192A //7 Ven fo if;

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Figure 1 1s a viewin side elevation, partly broken away, ofan improved mold tor con# Patented Aug. 24, 1926.

lWILLIAM: J. MAGKENZIE, or roarrLANn,` oraison.`

APPARATUS MAKING CONCRETE POSTS.

.Application filed August This invention relates to improvements in apparatus for making' concrete posts.`

The object of my invention iis to provide a sectional mold of vsimple construction wherein posts oi y ceinentitious composition and analogous"structures may be formed while in vertical and in reversed position to that which they will assume when positioned in actual use Whereby'tlie exposed end `and sides Avof the post when rremoved from the mold will be in practically finished condi- A furtherobject of the invention resides in the provision of novel devices and means iorqnlclrly `assembling and separating the `moldparts sotliat ap'considerable saving in time isV eliected overV ope ations nowin common use and whereby the mold can be` readily removed or Ytaken `apart without injury Vto the newlyfornied post.

' VOther objects andadvantages and objects relating to parts, vconibin'atfions `and arrangementso'fkthe invention such as 'the devices tor forming theiinishedend of the post and devices `i'o'ry supporting the `reinforcernent tailed .descriptionpto follow;

4The invention is illustrated by way of1 eX- ample 1n the accompanying drawings, 1n

material will hereinafter appearin the `decrete Yposts embodying" my invention.

Fig 2 is atop plan view of the saine.

laB isa AView"in"cross-section on" line 3-3o`tl `igjj1f 'Figl t is atop plan View of the baseplate of the invention, shown detached.

Fig'. 5 is Y a. `view in verticalcross-section otFi-g-/a V `Figz 6 is a view partly in side eleva-tieni and 4partly in 1vertical section ota post termed in accordance with my invention 4` set in the earth in operation condition.

` Reterring to said Views, wherein similar reference characters indicate similar parts in the severalviews, `and particularly tofFiff. 6, the reference numeral l indicates the upper Iefqatnsed Yportio'nFe` a post of concrete material formed intlie' mold hereinafter more' particularly described, and` 2 the l reinforcing; inetalrods Aarranged symmetrically 'adjacent 'thefcorners thereof. Saidirods tenddownwardly in parallel frelat-ion 7be` 1e, i924. serial No. 732,375.

youd the post-portion l, as at 2, and are setv `into a column 3 of concrete material `formed in an excavation in t'heground 4.

`Said Ipost is formed with relatively rectangular side faces 5 having the corners thereof chamlered, `as Vat 6, `and its upper extremity 7 `is likewise formed With peripheral edges `chamtered inwardly from the `faces"5" and corners 6, as at 8. A vertical .hole is'formed in the ground in Which the post is to beset having' a diameter several inches larger'thanthe diam eter of the post, which hole ris lled` with plastic concrete including a relatively con siderable proportionlot largo gravel to Vforni said column Band the protrudingends 'of the reinforcingrods2'V are tlnust into the fresh concrete with the lowerend l() of `the "post extending slightlylinto said concrete. The concrete material is thereupon allowed toset Yand wformsa rigid monolithic structure with `the post about 'which the s'ur rounding earth `has* notbeen moved and `which affords a strongand durableisup- Yport `for the rails 1lv of a tence or barrier nguarding a gulch ord'eclivityby the sideof arend.' Said posts Vare formed in the inold rwith spaced groups oi' holes throughwhich fthe bolts 12 extend bv which the rails 11 are securely ixedtofthe posts'.

Said post-portion 1 is formed in a mold, illustrated in Figs. l to 5 of the drawings, and which consistsin two substantially simi 'lar Wallsections 15 `and 16, anda base plate 17. Each'said wall-section `is made of cast iroiror steel and has its interior surface Corning' incontact with and adapted to'torm the'surita'ce of the post groundI and polished. Each said section includes two *walls 18 corresponding to the faces 5 of the post disposed relativelyat ninety degreeswith an inter- 4niecbiate chainferi-portionQO anduat one side joining the outer edge oit one of saidl walls `18 further cham'fer-portion l21. lilith the two sections connected together with said pori tions y21 4disposed upon opposite sides mold will'be provided to form a post'with` side Vwalls of the configuration described.

' Theplatelf` istormed with la `circula-r base @havinganintegral and continuous raised bead 23 formedsymmetrically thereon in the congnration of the crosssection 'ot' said vwallmold and haringportions 25 Vinclined inwardly therefrom and a horizontally plane to .the base-plate engages and serves to clamp the wall-sections to the base-plate by means of a wing-nut 32. Y

At the lateral edges of said wall-sections they are formed'with vertical flanges 33 Y which are provided with slots at spaced intervals on each side. shackle-bolts 36 are connected at each side to one of said sections at said slots and serve to couple the sections together by means of wing-nuts 37 in a wellY understood manner.V

Said base-plate is provided with integral bosses40 and 41 intermediate the shacklebolts 31 into which dowel-pins 42 and 43 are respectively positioned to engage in holes in the flange 28 of said wall-section 16, that is to say, said dowel-pins are both located upon the, same side of a line drawn through the joint between said wall-sections so that both Y pins will ,engage in the same wall-section.

Other dowel-pins protrude from the face of the flanges 33 4of the wall-section 16 engagingin corresponding holes in the opposing flanges of section l5 whereby the seo- Y tions are fitted together with eXactness.

Each of said wall-sections is formed with groups of holes 46 in one of their walls 18.

and upon relatively opposite walls to receive tapered steel pins 47 which extend V across the mold space and protrude at either side. Said pins 47 are desirably casehardenedat their smaller end so that they may be hammered thereupon to remove them from the mold after the post is formed without danger of battering their ends.

' Brackets 48 are detachably mounted upon the upper flange 27 by screw-bolts 50 and each include a vertically disposed integral sleeve 5l having a square aperture or of other configuration suitable to the reinforcing rods employed and throughY which a setscrew is provided.

Reinforcement rods 2 are secured in said,

apertures of the brackets and are secured by said set-screws so that their end 2 is spaced upwardly from the base-plate for about an inch. Saidbrackets are secured at each of the four corners of the mold so that.

Y said rods are extended into the mold adjacent theV corners of the post, that is to say adjai cent the chamfered portions 6 thereof.

Trunnions 53 are rigidly secured to the' respective wall-sections extending at oppo site corners of the mold when assembled whereby the mold and contained post may be conveyed where desired by a suitable truck.

i With the mold-parts as described interv nally lubricated and assembled in the manner set-forth and the rods 2 placed in position and clamped within the brackets 48, and the pins 47 inserted as described, the mold is filled with plastic concrete material and jarred on a jogging-platform (not shown). or the material may be tamped in any suitable manner to increase the density of the completed post. As the material Vin the mold settles down fresh material is shoveled in the top until the mold will hold no more whereupon the material is leveled off on the plane of the upper flange 27.

llhen the mold has been filled and sufficiently tamped the brackets 48 are loosened both from the mold-sections and from the rods and slipped upwardly over andV Lremoved from the rods. The filled mold may then be removed to a suitable place to set and in a few hours the wall-sections may i be removed by wedging them apart, the sec-V tion l5 coming away from the contained post laterally and then the section 16 is lifted from the bottom to free it from the. dowel-pins 42 and 43. The post now stands s upon its end 7 in the base-plate and remains in this position for another period after whichvit is readily removed from the baseplate and the pins 47 may then be knocked out leaving transverse holes in their places.

The fact that the posts are formed vertically and in reversed position, that'is to say, with their normally upper end at the bottom of the mold, and that all of the eX- posed portions of the post are formed against a polished metal surface results in`v the production of a post having a smooth finished surface on all of its exposed por tions and will require but little or no subsequent treatment to produce a post of {inished and highly pleasing appearance. The post is usually painted with a thin neat cement mixture to give a surface of fine teX- ture.

A substantially square Vpost having no lll) rectangular corners, either on its vertical n sides or about its top affords a post not only pleasing in appearance but particularly safeguarded against chipping and cracks at such corners, especially in view of the metal rod reinforcement positioned adjacent such vertical corners.

Having described my claim, is:

l. A mold for concrete post-s7 consisting in a metal base-plate having an integral,

raised bead providing a depression within said plate for forming the post-end, a pair of wall-sections arranged to be supported on said bead,fand screw-devices to clamp said invention, what l Wall-sections in operative position on said head.

2. A mold for concrete posts, consisting in aliarse-plate having an integral bead forined thereon to provide a depression Within the plate to forni the upper end of the post, and pair of Wall-sections mounted upon said head With their inner 'surfaces flush with the inner edges or' said bead, said Wall-sections being detaehahly secured to said plate and to each other.

3. A inold for concrete posts, consisting in a pair of vertical Wall-sections having opposing flanges at their vertical edges and horizontally disposed flanges at their lower edges, ineans to detaehably secure said sections together at their opposing flanges, a 1oase-plate having an integral, continuous head to support said lovver flanges of the Wall-sections, and means to detaehably secure said Wall-sections to the base.

e'. A inold for eonerete posts, consisting in a pair oi" Wall-sections laving horizontally disposed flanges at their upper and lower edges, a base upon which said Wall-sections are secured, hraclrets secured upon said upper horizontal flanges, each said bracket being formed with a vertically disposed sleeve, each sleeve having a set-serew in its side wall to secure a reinforcement rod in 510 suspended relation Within the forni.

VILLIAM J. MAGKEVZIE. 

